Bolt and nut.



G. G. ETTE. BOLT AND NUT. APPLICATION FILED 4mm 11111 s.

v flllllmll 1 a 4 W ihnsssss Inventor: OAXWW Charles G. Etta fi bY AbBY's telegraph pole showing my improved bolt improved bo t and nut; Fig. 3 is a cross secdea of power wasrequired to unscrew the .nut if the bolt had rusted.

' .UNITED STATES PATENT oFFIoEQ CHARLES G. ETTE, OF ST-. LOUIS, MISSOURI, ASSIGNOR TO ETTE INVESTMENT COMPANY,

OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

BOLT AND N UT.

Applicaticn filed January 81,

- Specification o1 LettersPatent.

Patented April 27, 1909-.

1908. Serial No. 4181597.

To all whom it may concern: I

Be it known that LOHARLEs G. ETTE, a citizen of theUnited States, residing at St. Louis, Missouri, have invented a certain new and useful Improvement in Bolts and Nuts, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accom anying drawings, forming part of this speci cation, in which Figure 1 is a side elevation of a portion of'a 5 and nut used for connecting a cross arm to sald pole; Fw. 2 1s a perspective view of my tional view taken through the screw threaded portion of the bolt; and Fig. 4 is a cross sectlonal view taken through the unthreaded portion of the shank of the bolt.

This invention relates to bolts, and has for its object to provide a bolt and nut of novel construction that are particularly adapted for connecting'wooden cross arms to tele raph poles although it will, of course, be un erstood-that my improved bolt and l nut could be used for other purposes.

It has heretofore been the practice to connect cross arms to telegraph ole's by means of ordinary round, forged b0 ts provided at one end with a head and at the opposite end with a screw-threaded portion on which a nut was mounted, washers being interposed betweenthe cross arm and nut and between the head of the bolt and the pole through which the bolt extended. The threads onthe bolt were comparatively fine so thata great deal/of time was expended in screwing the nut down into position and also removing it from the bolt, and as the threads of the nut interlocked throughout their entire len th with the threads of the bolt, a great One serious objection to the use'of ordinary bolts and nuts for connecting cross arms to poles is that a workman in replacinga cross arm which hasbroken or worn out, has to handle four parts for each fastening; namely, the bolt, nut and two washers. As the workman has to use one hand to retain his position on the pole while he is securing the cross arm in position, it is rather difiicult to handle these four parts, two of which are comparatively small, and it is also difiicult to unscrew the nut from the bolt if, the bolt has become rusted.

As previously stated, the main object of my invention is to provide a bolt and nut thatare particularly adapted for connectingcross arms to poles and to this end I have devised a bolt and nut which are so constructed that it will not be necessary to use washers with same, thereby reducing the number of parts which the workman has to handle when replacing a cross arm.

Another advantage of my improved bolt and nut is that the workman can use his fingers to run the nut down upon the bolt or off of the bolt, thus overcoming the necessity of using a wrench and also reducing thev tinlie required to connect the cross arm to the po e.

Another advantage of my improved construction is that the nut will not stick to the bolt even if the bolt has become rusted. And-still another desirable feature of my improved nut and bolt is that they can be manufactured for about one-half the cost of 4 manufacturing bolts and nuts of the type heretofore generally used for connecting cross arms to poles. I

Referring to the, drawings which illustrate the preferred form of my invention, 1 designates the shank of a bolt that is preferably made of malleable iron, and 2 desi nates a. wide fiat head on one end of said shank. The opposite end of the shank is provided with cast screw threads 3 that are formed during the o eration of casting the shank and the sha is also provided with a plurality of longitudinal grooves 4 that prefer ably extend throughout the entire length of the shank, thereby producing a fluted bolt. The bolt is made of cast metal and the object of providing it with longitudinally extending-grooves 4 is to obtain as much surface as possible for the heat. to work on and this permit the heat to penetrate to the center of the bolt during the o eration of annealing the bolt. An annea ed castin of this shape is also stronger than a cy 'ndricalshaped casting-and com rises less metal sa that the'bolt can be ro need at a low cost. Thethreads 3 on the Eolt are very coarse and as the bolt is fluted said threads will afford a comparatively small bearing surface for the threads of the nut 5 that is screwed onto the bolt and thus prevent the nut from sticking to the bolt after it has rusted. The threads.

to screw the nut down into position and also in running it off the bolt, a wrench or tool being required only to give the nut the last quarter turn and also to start it when it is i being removed from the bolt.

The nut 5 is provided at its inner end with an integral laterally projecting flange 6 that affords a wide bearing surface for the nut on the cross arm 7 and thus overcomes the necessity of using a washer, and the flange 6 is provided with teeth 8, any one of which can'be bent downwardly so as to sink. into the cross arm and thus lock the nut in position. In removing the nut it is only necessary to give a quarter turn to same with a wrench or other tool, so as to disengage the tooth 8 that was bent downwardly into the cross arm, the workman thereafter using his fingers to run the nut ofi the bolt. As the head 2 of the bolt is wide it will not be neceswings or lugs 10 that sink into the pole when described.

the bolt is driven into' the openingzthat has been formed in-the pole for same. This is a very desirable feature of my bolt as it overcomes the necessity of holding the bolt, while the nut is being screwed onto same or removed therefrom.

I prefer to form cross webs ,11 in the grooves 4 of the bolt so as to prevent water from running down said grooves and thus 7 rotting the pole 9 around the bolt.

Having thus described my invention, what Patent is:

A metal bolt provided with longitudinally extending grooves that interru t the screwthreads on same, and cross we s located in .said grooves to prevent water from running down into said grooves; substantially as In testimony whereof I hereunto affix my signature in the presence of two witnesses, this twenty-eighth day of January, 1908.

CHARLES G.

Witnesses: I

WALTER OLAREN E RAITHEL, M. O. HAMZMEL.

I claim as new and desire to secure by Letters 

